Casimir pauthonier



0. PAUTHONIERQ METHOD OF REPAIRING INGANDESOENT ELECTRIC LAMPfi. No. 439,178. Patented Oct. 28, 1890.

177/ Va mior llfilzessas's Wm UNITED STATES PATENT OFFICE.

CASIMIR PAUTHONIER, OF PARIS, FRANCE, ASSIGNOR TO THE SOCIETY LINCANDESCENOE ELEOTRIQUE, OF SAME PLACE.

M ETHOD OF REPAIRING INCAN DESCENT ELECTRIC LAM PS.

SPECIFICATION forming part of Letters Patent No. 439,178, dated October 28, 1890. Application filed June 7, 1890. Serial No. 354,631. (No model.) Patented in France November 23, 1886, No. 179,824-

To all whom it may concern.-

Be it known that I, CAsIMIR PAUTHONIER, a citizen of the Republic of France, and a resident of Paris, have invented certain new and useful Methods of Repairing Incandescent Electric Lamps (for which I have obtained a patent in France dated November 23, 1886, No. 179,824, and certificate of addition dated on' or about November 17, 1887;) and I do hereby declare the following to be a full, clear, and exact description of the same.

The present invention is an improvement in the method described and claimed in the patent granted to me May 31, 1887, No. 363,909, and has for its object a new method of repairing incandescent electric lamps, the various methods of application of which are shown in the accompanying drawings.

In the drawings, Figure 1 shows a lamp the filament of which is broken and consequently useless. All the work is lost, since without the carbon entire the lamp cannot act. Fig. 2 shows this lamp open at the top A. The filament, which is broken, as in the first case, has been completely withdrawn and therehas been only left on the platinum electrodes about two millimeters of the old carbon to act as primers to the soldering at B and C. This figure also shows the level of hydrocarburet, which may be varied, but which ought to be such that the electrodes may be entirely uncovered. Fig. 3 shows a new carbon introduced into the globe by the aperture A, and the ends of which E and O are presented to the primers B and O. This carbon is held in this position by a thread of copper attached to a gallows, the arm of which may be raised or lowered, as required. These extremities are brought to the primers B and 0 by means of a small plier, the head of which is connected by a supple thread to one of the poles of any electric S0l11C6-S11Cl1 as a dynamo-machine, primary battery, or accumulator-whatever. Fig. at shows the lamp ready for exhaustion. Fig. 5 shows the lamp completed.

I first effect the soldering of joint B and B by bringing the filament of the primer of the same extension into contact and by starting a current. Under its influence the hydrocarburet decomposes in part and a deposit of solid carbon forms in B and B, which holds the end of the new carbon steady on the primer of the old carbon arranged to receive it. The current is then turned back with the help of a switch located in the circuit ot the lamp, and with the same plier I proceed in the same manner with O and O. The carbon is then soldered at both ends in the place of the old one. It is then easy to understand that if the carbon has been measured before introducing and soldering it, and thatif its resisting force is identical to that of the old one of which it is to take the place,I shall have a-lamp identical in electro-motive force, and in intensity identical to what it was during its first period of light. With this process, then, I can utilize all the globes of all the lamps the filament of any one of which has been broken a single time, and which lamps are actually valueless, and that I can make of them excellent lamps, having the same value as previously, since it is the carbon which constitutes the lamp, and since I have replaced the old one, partly disaggregated, by a new one. In this way I can make lamps of every electro-motive force, for I can solder a carbon of any resisting force in a globe, but always within the limit of resisting force of those lamps in use. It is needless to say that the lamp is mounted on a support in connection with the source of electricity by derivation, and that a switch is located in the circuit of the lamp.

Fig. 4 shows the lamp void of carburet and the solderings completed. At A, I have soldered a glass tube choked up at this point. This tube will be mounted on a pump, which should exhaust the air from the lamp. The exhaustion finished, we cut the choked tube at the blow-pipe and the lamp is perfectly reestablished without being changed in form and without being taken to pieces. All the work of repairing has been done by the aperture A.

It is to be remarked that the operation may be worked several times. Indeed, Ican repeat these operations perfectly well with a fresh rupture of the filament, which will never take place with the solderings. These different operations are much less costly than those of manufacture, with the exception of the opera tion of exhausting, which is the same. The process for a lamp of equal value entirely takes off the cost of all the former materials, except the carbon. It does away with a good part of the labor and all manner of processes to give the lamp its shape, and does away with almost all the waste of manufacture.

Fig. 5 shows a lamp finished and ready for use in the same place it occupied-that is to say, on the same circuit-since the carbon, which has replaced the old one is identical to it, and since, consequently, the constants are the same as in the previous case.

I claim The herein-described process of repairing the filaments of incandescent lamps, which consists in the introduction into the lamp containing the broken filament of a liquid or gaseous hydrocarbon, bringing together two of the sundered ends of the filament, then passing the current through a portion of the filament including the joint for the purpose of welding the ends by the deposit of carbon, then bringing together the other ends of the filament, and then passingacurrent through the filament, substantially as hereinbefore specified.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CASIMIR PAUTHONIER.

\Vitnesses:

EUGENE DUBoIs, R. J. PRESTON. 

